Core-box cutter.



No. 824,962. PATENTED JULY 3, 1906. F. E. THUMBS. GORE BOX CUTTER.

APPLICATION FILED JUNE 7, 1905.

3 SHEETS-SHEET 1.

No. 824,962. PATENTED JULY 3, 1906.

F. E. THOMES. GORE BOX CUTTER.

APPLICATION FILED JUNE 7, 1905. I

THE NORRIS 95750:: cm. wAsmNomm-lm C.

No. 824,962. 7 PATENTED JULY 3, 1906.

F. E. THUMBS.

GORE BOX CUTTER.

APPLICATION FILED JUNE 7, 1905.

3 SHEETS-SHEET 3.

III

Q JM I wxfimw I 7 A I rm: NORRIS PITERS 5a., wAsumarau, n. c.

UNITED sTATns PATENT OFFICE.

No. 824,962. Specification of Letters Patent. Patented July 3, 1906.

Application filed June '7, 1905. Serial No. 264,065.

To all whom it Wuty concern.-

Be it known that I, FRANK E. THOMES, a I

citizen of the United States of America, and a resident of Portland,county of Cumberland, State of Maine, have invented certain new anduseful Improvements in Core-Box Cutters, of which the following is aspecification.

My invention relates to a core-box cutter, and particularly to certainimprovements in my machine as patented February 23, 1904, i No. 753,178.

' table is raised and lowered, and k is a handwheel for operating thesame. These parts are all substantially as shown in my prior patent andneed no further explanation. Means are provided by which the cutter-headarbor, when a small cutter is to be used, maybe supported on both sidesof the cutter-head. For this purpose I form a bracket 0, Fig. 3, whichcomes up outside of and above the upper level of the main gear, and inthe upper end of this bracket is journaled the outer end of the arbor e,on which is secured the cutter-head In the above-mentioned machine agear f and adjacent thereto the pinion e. As here was secured to the endof a horizontal shaft, f said gear engaging a second gear which wasabove it and which was pivoted on a stud projecting out from a bracketextending upi ward from the journal-box of the main shaft. j Secured tothe upper gear was a cutter-head of the machine.

My present invention relates, first, to pro- I viding a bearing on eachside of the cutter head instead of pivoting it on a stud, as shown;second, in making the cutter-head, the two gears, and their connectingmechanism quickly and easily removable as a whole, whereby they may beeasily shifted and, finally, in providing an adjustable pivoting-pointadapted to pivot the block on acenter over the cutter-head, whereby ahemispherical or annular recess may be formed in the block. Thesefeatures of construction I will now proceed to specifically describe.

My invention is illustrated by means of the accompanying drawings, whichshow a corecutting machine provided with my improvements.

In the drawings, Figure 1 is a vertical section parallel with the shaft,showing the working parts in elevation. Fig. 2 is a section on the lineat 00 of Fig. 1. Fig. 3 is an enlarged longitudinal section through thecutter-head and connecting mechanism with portions in elevation. Figs. 4and 5 are plan views of blocks, showing the form of channels cut by theuse of my pivoting device. Fig. 6 is a section on the line as a: of Fig.3, and Fig. 7 is a plan view.

Referring to Figs. 1 and 2, A represents the table; a, the standardwhich supports the table; a, the horizontal slot through which thecutter-head works; 5 the main shaft; 1), and b the journal-boxes of themain shaft, and g the main gear. Zr: is the screw by which the whichworked up through a slot in the table I shown, the other end of thearbor e is pivoted on a conical stud d, which projects outi ward fromthe upper portion of the box in whichthe outer end of the shaft isjournaled. t represents the cutter held in a transverse hole in thecutter-head by a setscrew f.

For the purpose of making the cutting mechanism readily removable forthe purpose of changing cutters I provide an extensionbox C, in which isournaled a short sleeve gi on the outer end of which the gear 9 issecured. The sleeve 9 is adapted to slip on over the end of the shaft,and clutch mechanism is provided to hold it in place on the shaft.

As here shown, projections b are formed on the shaft, and slots orrecesses are formed in the inner end of the sleeve, which recessesinterlock or engage the projections 12 in the well-known manner. To holdthe sleeve in. place, a nut g is screwed on its inner end over therecesses, this nut being contained in a re cess in the extension-box (J.The extensionbox is held in place by means of a rearward extension 0,which fits on top of the journalbox I) and is secured in place by ascrew 0 I have represented in Fig. 2 the cross-section of a block inprocess of-being channeled, and in connection with such channels I mayform annular or hemispherical recesses. For this purpose means areprovided for pivoting the block 0 at a point on top and over thecutterhead. For this purpose I provide a horizontal adjustable arm i,held in a socket 77, secured to the clamp h, provided with aclamping-nut h. The end of the arm 2' is turned downward, and a pin 71extends .down through, forming a pivoting-point adapted to enter the topof the block. In practice a small hole is bored to admit the pin. Thepin 1' may be located directly over the center of the cutter-head when ahemispherical re cess is to be formed, or it may be located away fromthe head when a U-shaped channel is to be out, as shown in Fig. 4.

In Fig. 4 I show the under side of a block in which has been cut aU-shaped recess by the use of my improved machine. In this operation theblock is run over the cutter, forming the half-round channels 1 in theusual way, to the dotted line p 19 a hole having been formed in theupper surface of the block opposite the point p. Into this hole the pin1' is introduced and the arm i clamped in place. The block 0 is nowswung around. one hundred and eighty degrees and is then run straight,forming the other channel 1", parallel with the channel 1. When achannel is to be terminated, as shown in Fig. 5, by a spherical end, thecutter is run straight to the point p in the center of the channel, andthe pin i is inserted in the top of the block opposite this point. Theblock is then swung around one hundred and eighty degrees, as before,and the special end thus cut.

The operation of my machine and the use of the above-describedimprovements will be readily understood. The cutter-head projects upthrough a slot in the table and is provided with mechanism here shown,by which it may be raised and lowered vertically. The block to be cut isrun over the cutter-head parallel with its axis, cutting first a shallowchannel, which is gradually deepened by raising the cutterhead until thechannel' be comes semicylindrical in form. When small cutter heads areto be used, the outside bracket 0 furnishes a support for the outer endof the arbor, and there is sufficient space between the body of thebracket and the gear to allow the cutter to revolve.

By constructing the cutter-head and gears, as shown, mounted in theextension-box the whole can be quickly changed to substitute one cutterfor another. The pivoting-arm enables me to out either hemispherical orannular channels quickly and easily.

I claim- 1. In a core-box cutter, the combination of a journal-box, amain shaft j ournaled therein, a gear on the end of said shaft, abracket on the end of said box extending above and outside of said gear,an arbor one end of which is j ournaled in the upper portion of saidbracket and one end in the upper portion of said box, a pinion on saidarbor engaging said gear, a cutter-head adjacent to said pinion, acutter in said cutter-head being adapted to rotate in the space betweensaid bracket and said gear.

2. In a core-box cutter, the combination of a journal-box, a main shaftjournaled therein, a gear on the end of said shaft, a bracket on the endof said box extending above and outside of said gear, an arbor, one endof which is journaled in the upper portion of said bracket, a stud onsaid box on which the other end of said arbor is pivoted, a pinion onsaid arbor engaging said gear, a cutter-head adjacent to said pinion anda cutter in said cutter-head adapted to rotate in the space between saidbracket and gear.

3. In a core-box cutter, the combination of a journal-box proper, ashaft journaled therein, an extension-box having a rearward projectionadapted to be secured to said box, a sleeve ournaled in said extensionand adapted to receive the end of said shaft, a clutch mechanism forlocking the sleeve to the shaft, a gear on the outer end of said sleeve,a pinion pivoted above said gear and engaging with it and a cutter-headsecured to the journal of said pinion.

4. In a core-box cutter the combination of a journal-box, proper, ashaftjournaled therein, an extension-box having a rearward projection adaptedto be secured to said box, a sleeve journaled in said extension-box andadapted to receive the end of said shaft, projections being formed onsaid shaft and notches in the rear end of said sleeve to engage saidprojections to form a clutch con nection, a nut adapted to screw on therear end of said sleeve over said notches, a gear on the outer end ofsaid sleeve, a pinion engaging said gear and a cutter-head connectedwith said pinion.

5. In a core-box cutter the combination of a main shaft, a gear on theend of said shaft,

a pinion above said gear and engaging therewith, a cutter-head connectedwith said pinion, and a horizontally-adjustable arm having a downwardprojecting end provided with a pivoting-point adapted to enter the woodblock and to form a center over the said cutter-head to form ahemispherical or annular or other like recess.

Signed at Portland, Maine, this 15th day of May, 1905.

FRANK E. THOMES.

I/Vitnesses:

S. WV. BATES, C. M. GODFREY.

IOO

